Should not be greater than 45°. schraegungswinkel = bevel angle perpendicular to the rack's length; 0° = straight teeth Helical gears run more smoothly than gears with straight teeth. However, they ...

Specifying the number of teeth sounds like a helpful setting ... pressure_angle, diametral_pitch ) helical_gear(pitch_diameter, bore_diameter, helix_angle, thickness, pressure_angle, diametral_pitch ) ...